JPH09228164A - Apron tension lever - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apron tension lever satisfying strength as a tension lever, capable of smoothly running an apron without wearing and contriving cost down. SOLUTION: This apron tension lever has a pair of board parts 1a and 1b pierced by a tension rod 2, a connecting part 1c connecting the pair of board parts 1a and 1b and a tension imparting part 1d extended from one of the pair of board parts and bent in a hook state so as the apron AP to be expanded, and the pair of board parts 1a and 1b, the connecting part 1c and the tension imparting part 1d are molded in one body by a press molding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apron tension lever of an apron tension device arranged in a draft part of a spinning machine.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a general long apron tensioning device 40 in a spinning machine has a supporting frame 41 as a fixed portion and a supporting frame 41 thereof.
And a tension lever 42 as a movable part that is swingably attached to the roller stand 43. The support frame 41 is fixed to the roller stand 43 by using bolts 42.

The tension lever 42 is constructed so that it can swing with a tension rod 44 penetrating its rear end as a fulcrum, and a coil spring 45 is inserted through the tension rod 44. By engaging one end of the coil spring 45 with the key groove 44a of the tension rod 44 and the other end with the notch 42a of the tension lever 42, the tension lever 42 is biased in the direction of arrow A. Has become.
Further, the apron contact portion 42b at the front end portion of the tension lever 42 is provided so that smooth apron travel can be obtained.
It is composed of a thick member having a curved surface.

In FIG. 6, reference numerals 47, 48 and 4 are used.
Reference numeral 9 indicates a top roller group of draft rollers,
Similarly, reference numerals 1 and 52 denote bottom roller groups, and B denotes a yarn advancing direction.

[0005]

The conventional tension lever has sufficient strength to surely give tension to the apron 46, does not wear due to sliding of the apron, and is still apron 46. The concept that die-cast parts are optimal as a member that enables smooth running is established. However, in order to manufacture such die-cast parts, a precise mold is required, so the production cost is high, and in addition, mechanical finishing is not possible and mass production is not possible. It is an obstacle.

Therefore, an attempt has been made to form the tension lever by a plastic molded product instead of die casting. However, in the case of plastic molded products, the contact surface with the apron wears out, and in order to maintain the prescribed dimensional accuracy without distortion, the thickness of the member must be increased to reinforce, and the tension lever becomes larger. As a result, problems such as an increase in cost arise, and they have not been put to practical use.

The present invention has been made in consideration of the above problems in the conventional tension lever. The strength of the tension lever is satisfied, and the apron can be smoothly run without wear. It is intended to provide an apron tension lever that can reduce costs.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a pair of plate portions penetrated by a tension rod, a connecting portion connecting the pair of plate portions, and a pair of plate portions are provided. And a tension applying portion bent in a hook shape so that the apron can be stretched, and a pair of plate portions, a connecting portion and a tension applying portion are integrally formed by press working. It is a lever.

In the present invention, it is preferable that a cap body having a curved surface, for example, having a C-shaped or W-shaped cross section is fitted to the apron contact portion of the tension applying portion. Further, on the surface of this cap body, a large number of uneven lines can be formed along the apron running.
Such a large number of concavo-convex lines can be linearly contacted with the apron without making surface contact, and the sliding resistance during traveling of the apron can be further reduced. Further, in the present invention, the apron contact portion may be configured by a bent portion that is bent and bent from the tension applying portion instead of the cap body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 is a perspective view showing an embodiment of an apron tension lever of the present invention, and shows a state seen from below. Apron tension lever shown in the figure (hereinafter simply referred to as tension lever) 1
Is a cold-rolled steel plate of 1 type and a standard thickness of 2.3 mm, which is press-formed, and is formed by connecting a pair of plate portions 1a and 1b penetrating the tension rod 2 and the pair of plate portions. Mainly composed of a connecting portion 1c and a tension applying portion 1d extending from one of the pair of plate portions 1a toward the draft roller side and bent in a hook shape so that the apron AP can be stretched. There is.

The detailed structure of each unit will be described below with reference to FIG. The pair of plate portions 1a and 1b have through holes 1e and 1e for passing the tension rods, respectively.
1e is bored, and the plate portions 1a and 1b and the connecting portion 1c are connected in a U-shape. The tension applying portion 1d extending from the plate portion 1a extends in a stepwise manner so as to be slightly wider so as to correspond to the apron width W, and a flat plate-shaped apron formed on the tip side of the tension applying portion 1d. The clip 4 as a cap body is fitted to the contact portion 1f as a separate component.

The clip 4 having a W-shaped cross section has two ridges 4a and 4b having a semicircular cross section, and a flat plate portion 4b for connecting the ridges 4a and abutting the apron contact portion 1f. And a locking portion 4c formed on the legs of the ridges 4a and 4b and locked to the edge of the apron contacting portion 1f. The clip 4 having such a structure itself has a spring body. It functions as. Therefore, this clip 4
If the apron contact portion 1 is used, it does not require any special fixing means and positioning, and the legs are simply expanded and pressed.
It can be fitted to f. After the fitting, the clip 4 is firmly fixed and does not deform even when the apron slides. The clip 4 is preferably made of a stainless steel material that has been hardened, but is not limited to this and may be made of a spring material.

Further, in the structure using the clip, as shown in FIG.
As shown in FIG. 4, it is possible to form an uneven line on the surface. This uneven line is for making a linear contact with the inner surface of the apron rather than a planar contact, and can further reduce the sliding resistance generated when the apron goes around. The clip 5 shown in FIG. 3 has a shape in which a circular wave 5a is continuously and linearly formed along the traveling direction of the apron.

The shape of the clip 6 shown in FIG. 4 is such that a circular wave in cross section is intermittently formed. Specifically, the circular waves 6a and 6b in cross section are alternately arranged along the traveling direction of the apron. In particular, the one shown in FIG. 4 has a small apron sliding resistance, is excellent in the effect of preventing the attachment of apron wear debris, and has the advantage that the durability of the apron can be enhanced because no traces are marked on the inner surface of the apron. There is.

By using such a clip, it is possible to easily obtain a shape for reducing sliding resistance at the apron contact portion of the tension applying portion. That is, it is not necessary to form the corrugated thick portion unlike the conventional die-cast component. Further, a clip having an optimum shape can be selected according to operating conditions, and since the clip can be replaced, maintenance of the apron contact portion can be easily performed.

When the tension lever 1 of this embodiment is attached to the tension rod 2, the coil spring 3 is provided in the same manner as in the prior art (see FIG. 1), so that the tension lever 1 has an arrow mark. It will be biased in the C direction. Further, reference numeral 1h in FIG. 1 indicates an apron AP.
Is a guide for stable traveling.

The operation of this embodiment having the above configuration will be described below. The tension lever 1 inserted into the tension rod 2 ensures a stable rocking motion by the pair of plate portions 1a and 1b arranged apart from each other, and the apron AP is
Tension is applied by orbiting while making contact with the two ridge portions 4a and 4b of the clip 4 fitted in the apron contact portion 1f. The ridges 4a and 4b
Serves to reduce sliding resistance when the apron AP goes around, and maintains stable running of the apron AP.

FIG. 5 shows another embodiment of the present invention. In the figure, the same components as those in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. In the figure, the apron contact portion 1f 'is formed with bent portions 1g, 1g which are integral with the tension imparting portion 1d and are bent inward to form a curved cross section. The bent portions 1g, 1g are arranged in parallel in a direction orthogonal to the apron running direction, and extend from each end of the apron contact portion 1e. In the configuration of the present embodiment as well, similar to the clip 4, the sliding resistance during traveling of the apron can be reduced. Further, according to this configuration, the present invention can be realized only by pressing without using a separate component.

In the tension lever of this embodiment, the tension applying portion 1d is extended from the plate portion 1a.
The present invention also includes a configuration having a symmetrical arrangement, that is, a configuration in which the tension applying portion 1d is extended from the plate portion 1b.

Further, in the present invention, a cover for covering the coil spring 3 may be provided extending from the connecting portion 1c. By providing the cover in this way, it is possible to prevent the attachment of cotton waste or the like.

Further, the cap body of the present invention is not limited to the W-shaped cross section shown in the above-mentioned embodiment, but may be a C-shaped cross section. Further, the present invention can be suitably applied to a ring spinning machine, but can also be applied to an apron tension device in a draft device of a roving frame.

[0022]

As is apparent from the above description,
According to the present invention, the strength of the tension lever is satisfied, the apron can smoothly travel without wear, and the cost can be reduced. Further, since the tension lever has a lightweight structure, the followability with respect to traveling on an apron is improved. According to the present invention of claim 2, the sliding resistance of the apron can be reduced. According to the present invention of claim 3, the durability of the apron can be enhanced while preventing the apron abrasion debris from adhering. According to the present invention of claim 4, the tension lever can be configured only by pressing.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a tension lever according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a detailed shape of the embodiment.

FIG. 3 is an explanatory view showing the shape of the clip of the embodiment.

FIG. 4 is an explanatory view showing the shape of another clip of the same embodiment.

FIG. 5 is an explanatory diagram showing a configuration of a tension lever according to another embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a configuration of a conventional tension lever device.

[Explanation of symbols]

 1 Tension Lever 1a, 1b Pair of Plates 1c Connection Part 1d Tension Applying Part 1e Through Hole 1f Apron Contact Part 2 Tension Rod 3 Coil Spring 4 Clips 4a, 4b Convex Lines

Claims (4)

[Claims] 1. A pair of plate portions penetrating the tension rod, a connecting portion connecting the pair of plate portions, and an apron extending from any one of the pair of plate portions. An apron characterized in that it has a tension applying part bent in a hook shape so as to obtain, and the pair of plate parts, the connecting part and the tension applying part are integrally formed by press working. Tension lever. 2. The apron tension lever according to claim 1, wherein a cap body having a curved surface is fitted to the apron contact portion of the tension applying portion. 3. The apron tension lever according to claim 2, wherein a large number of concavo-convex lines are formed on the surface of the cap body along the apron running. 4. The apron tension lever according to claim 1, wherein the apron contact portion of the tension applying portion is a bent portion that is bent from the tension applying portion.